<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="AddRoleDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区 -->
            <el-table :data="rolesList" border stripe>
                <!-- 展开列，通过 expand 实现 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1 === 0 ?'bdtop':'']" v-for="(item1,i1) in scope.row.children"
                                :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable
                                        @close="removeRightById(scope.row,item1.id)">{{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for 循环得到二级权限-->
                                <el-row :class="[i2 !== 0 ?'bdtop':'']" v-for="(item2,i2) in item1.children"
                                        :key="item2.id">
                                    <!-- 渲染二级权限 -->
                                    <el-col :span="6">
                                        <el-tag type="success" closable
                                                @close="removeRightById(scope.row,item2.id)">{{item2.authName}}
                                        </el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <!-- 渲染三级权限 -->
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id"
                                                closable
                                                @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">
                            编辑
                        </el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete"
                                   @click="removeRoleById(scope.row.id)">删除
                        </el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting"
                                   @click="showSetRightDialog(scope.row)">分配权限
                        </el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 添加角色对话框 -->
        <el-dialog title="添加角色" :visible.sync="AddRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
            <el-form
                    :model="addRoleForm"
                    ref="addRoleFormRef"
                    :rules="addRoleFormRules"
                    label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
        </el-dialog>
        <!-- 编辑角色对话框 -->
        <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
            <el-form
                    :model="editRoleForm"
                    ref="editRoleFormRef"
                    :rules="editRoleFormRules"
                    label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoles">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限对话框-->
        <el-dialog
                title="分配权限"
                :visible.sync="setRightDialogVisible"
                width="50%"
                @close="setRightDialogClosed">
            <!-- 树形控件-->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id"
                     default-expand-all
                     :default-checked-keys="defKeys"
                     ref="treeRef">
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: "Roles",
        data() {
            return {
                // 所有角色列表数据
                rolesList: [],
                // 添加角色对话框
                AddRoleDialogVisible: false,
                // 添加角色表单
                addRoleForm: {},
                // 添加角色表单验证
                addRoleFormRules: {
                    roleName: [
                        {required: true, message: '请输入角色名称', trigger: 'blur'}
                    ],
                    roleDesc: [
                        {required: true, message: '请输入角色描述', trigger: 'blur'}
                    ]
                },
                // 编辑角色信息
                editRoleForm: {},
                editRoleDialogVisible: false,
                editRoleFormRules: {
                    roleName: [
                        {required: true, message: '请输入角色名称', trigger: 'blur'}
                    ],
                    roleDesc: [
                        {required: true, message: '请输入角色描述', trigger: 'blur'}
                    ]
                },
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible: false,
                // 所有权限的数据
                rightsList: [],
                // 树形控件的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },
                // 默认选中的节点Id值数组
                defKeys: [],
                // 当前即将分配权限的角色id
                roleId: ''
            }
        },
        created() {
            this.getRolesList()
        },
        methods: {
            // 获取所有角色列表
            async getRolesList() {
                const {data: res} = await this.$http.get('roles')
                if (res.meta.status !== 200) {
                    return this.$message.error("获取角色列表失败！")
                }
                this.rolesList = res.data

            },
            // 添加角色对话框的关闭
            addRoleDialogClosed() {
                this.$refs.addRoleFormRef.resetFields()
            },
            // 添加角色
            addRoles() {
                this.$refs.addRoleFormRef.validate(async valid => {
                    if (!valid) return
                    const {data: res} = await this.$http.post('roles', this.addRoleForm)
                    if (res.meta.status !== 201) {
                        this.$message.error('添加角色失败！')
                    }
                    this.$message.success('添加角色成功！')
                    this.AddRoleDialogVisible = false
                    this.getRolesList()
                })
            },
            // 删除角色
            async removeRoleById(id) {
                const confirmResult = await this.$confirm(
                    '此操作将永久删除该角色, 是否继续?',
                    '提示',
                    {
                        confirmButtonText: '确定',
                        cancelButtonText: '取消',
                        type: 'warning'
                    }
                ).catch(err => err)
                if (confirmResult !== 'confirm') {
                    return this.$message.info('已取消删除')
                }
                const {data: res} = await this.$http.delete('roles/' + id)
                if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
                this.$message.success('删除用户成功！')
                this.getRolesList()
            },
            // 编辑角色
            async showEditDialog(id) {
                const {data: res} = await this.$http.get('roles/' + id)
                if (res.meta.status !== 200) return this.$message.error('查询角色信息失败！')
                this.editRoleForm = res.data
                this.editRoleDialogVisible = true
            },
            editRoles() {
                this.$refs.editRoleFormRef.validate(async valid => {
                    // 表单预校验失败
                    if (!valid) return
                    const {data: res} = await this.$http.put(
                        'roles/' + this.editRoleForm.roleId,
                        {
                            roleName: this.editRoleForm.roleName,
                            roleDesc: this.editRoleForm.roleDesc
                        }
                    )
                    if (res.meta.status !== 200) {
                        this.$message.error('更新角色信息失败！')
                    }
                    // 隐藏编辑角色对话框
                    this.editRoleDialogVisible = false
                    this.$message.success('更新角色信息成功！')
                    this.getRolesList()
                })
            },
            /* 根据id 删除对应的权限*/
            async removeRightById(role, rightId) {
                // 弹框提示用户是否要删除
                const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)
                if (confirmResult !== 'confirm') {
                    return this.$message.info('取消了删除')
                }

                const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if (res.meta.status !== 200) {
                    return this.$message.error('权限删除失败')
                }
                role.children = res.data
            },
            /* 展示分配权限对话框 */
            async showSetRightDialog(role) {
                this.roleId = role.id
                // 获取所有权限数据
                const {data: res} = await this.$http.get('rights/tree')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取权限数据失败')
                }
                // 获取到的权限数据
                this.rightsList = res.data
                // 获得三级节点的id
                this.getLeafKeys(role, this.defKeys)
                this.setRightDialogVisible = true;
            },
            // 通过递归的形式，获得角色下所有三级权限的id，并保存到 defkeys 数组中
            getLeafKeys(node, arr) {
                // 如果当前 node 节点不包含children 属性，则是三级节点
                if (!node.children) {
                    return arr.push(node.id)
                }
                node.children.forEach(item => this.getLeafKeys(item, arr))

            },
            // 监听分配权限对话框关闭事件
            setRightDialogClosed() {
                this.defKeys = []
            },
            // 为角色分配权限
            async allotRights() {
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                const idstr = keys.join(',')
                const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,
                    {rids: idstr})
                if(res.meta.status !==200){
                    return this.$message.error('分配权限失败')
                }

                this.$message.success('分配权限成功')
                this.getRolesList()
                this.setRightDialogVisible = false

            }
        }
    }
</script>

<style scoped>

</style>
